Boiler soot blowing system and boiler
By introducing hydrophobic components and soot blowing components into the boiler soot blowing system, the steam circulation heating pipe is realized, which solves the leakage problems caused by slag collection and steam aggregation on the heated surface of the coal-fired boiler, and improves the operation safety and efficiency of the boiler.
Patent Information
- Application Number
- CN202323658944.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-29
AI Technical Summary
The slag collection on the heated surface of the coal-fired boiler leads to high-temperature corrosion and heat transfer efficiency, which increases the boiler smoke exhaust temperature and the risk of furnace pipe leakage. The existing steam soot blowing system causes steam aggregation at the blind end of the soot blowing pipe, which increases the boiler heat. Facial damage and leakage risk.
A boiler soot blowing system is designed, including steam source, hydrophobic components and soot blowing components. The hydrophobic components realize steam circulation heating pipes through the main water-phobic main road and hydrophobic switch, eliminating the blind spots of the soot blowing pipes and reducing water vapor aggregation. The probability of ensuring the safety and efficiency of the soot blowing process through temperature sensors and steam regulating valves.
It effectively reduces the risk of damage to the boiler heating surface and furnace pipe, improves the safety and efficiency of the soot blowing process, and reduces the operating risks and maintenance costs of the boiler.
Smart Images
Figure CN222164838U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boiler soot blowing, in particular to a boiler soot blowing system and a boiler. Background Art
[0002] For coal-fired boilers, slag accumulation on the furnace heating surface is a common phenomenon. When the superheater and reheater in the high-temperature area are severely coked, high-temperature corrosion will occur and the heat exchange capacity will be weakened; when the tail heating surface is seriously dusted, the heat transfer efficiency of the superheater, reheater, economizer, air preheater, etc. will be reduced, the boiler exhaust temperature will rise, and the boiler efficiency will be reduced. The above problems caused by slag accumulation on the heating surface will greatly reduce the life of the heating surface and reduce the efficiency of the unit. In severe cases, it will affect the normal operation of the boiler.
[0003] In order to clean up the slag on the boiler heating surface in time, boilers are generally designed with steam soot blowing systems to use steam to remove the slag on the boiler heating surface. However, some steam soot blowing systems have blind ends in the soot blowing pipes, and the steam cannot effectively warm the pipes after entering. Part of the steam will condense into water vapor when it flows to this end during steam soot blowing due to the low temperature of the inner wall of the pipe. After the water vapor is carried into the boiler by the steam, it will damage the boiler's heating surface, thereby increasing the risk of boiler tube leakage. Utility Model Content
[0004] The main purpose of the utility model is to provide a boiler soot blowing system, aiming to reduce the risk of boiler tube leakage.
[0005] To achieve the above purpose, the boiler soot blowing system proposed in the utility model includes:
[0006] Steam source;
[0007] A drain assembly, the drain assembly comprising a drain main path and a drain switch, the head end of the drain main path being connected to the steam source, and the drain switch being arranged at the tail end of the drain main path; and
[0008] At least one sootblowing assembly, each of which comprises a sootblowing pipeline and at least one sootblower; both ends of each sootblowing pipeline are connected to the main drain path respectively; each sootblower in each sootblowing assembly is respectively arranged on the corresponding sootblowing pipeline.
[0009] Optionally, the drain component also includes a drain bypass, the tail end of the drain bypass is connected to the drain main line, and the tail end of each soot blowing pipeline is respectively connected to the head end of the drain bypass; the head end of each soot blowing pipeline is respectively connected to the pipeline between the head end of the drain main line on the drain main line and the tail end of the drain bypass.
[0010] Optionally, the extension direction of the hydrophobic bypass is inclined downward along the gravity direction and the head end of the hydrophobic bypass is higher than the tail end of the hydrophobic bypass.
[0011] Optionally, the sootblowing assembly further includes a temperature sensor, and the drain switch is a solenoid valve; the temperature sensor is disposed in a pipeline of the drain main line, and the temperature sensor is electrically connected to the solenoid valve.
[0012] Optionally, the sootblowing assembly further comprises a temperature display screen, which is disposed at the tail end of the main drainage path, and the temperature display screen is electrically connected to the temperature sensor.
[0013] Optionally, the drain assembly further includes a steam regulating valve, and the steam regulating valve is arranged at the head end of the drain main path.
[0014] Optionally, the drain assembly further comprises a flow meter, which is arranged in the drain main line and located at an end of the steam regulating valve away from the steam source.
[0015] Optionally, the drain assembly further comprises a pressure gauge, which is arranged in the drain main line and located at an end of the steam regulating valve away from the steam source.
[0016] Optionally, an expansion bend is formed at a connection between each of the sootblowing pipelines and the drain bypass.
[0017] The utility model also provides a boiler, which comprises any one of the above-mentioned boiler sootblowing systems.
[0018] In the technical scheme of the utility model, the boiler sootblowing system includes a steam source, a drain assembly and at least one sootblowing assembly; the drain assembly includes a drain main line and a drain switch, the head end of the drain main line is connected to the steam source, and the drain switch is arranged at the tail end of the drain main line; each sootblowing assembly includes a sootblowing pipeline and at least one sootblower; the head and tail ends of each sootblowing pipeline are respectively connected to the drain main line; each sootblower in each sootblowing assembly is respectively arranged on the corresponding sootblowing pipeline. Before sootblowing, close the drain switch and each sootblower, and the steam returns to the drain main line from the drain main line through each sootblowing pipeline to realize the steam circulation heating of the pipes. After the heating of the pipes is completed, open each sootblower to blow soot on the boiler. In the technical solution of the utility model, steam circulates in the boiler sootblowing system, eliminating the blind spots for heating pipes in each sootblowing pipeline, preventing some sootblowing pipelines from having no effective pipe heating and condensing part of the steam into water vapor, thereby reducing the probability of steam containing water vapor entering the boiler for sootblowing, thereby reducing the risk of boiler tube leakage due to damage to the boiler heating surface. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0020] Figure 1 The schematic diagram of the plan structure of an embodiment of the boiler sootblowing system provided by the utility model.
[0021] Description of Figure Numbers:
[0022] Label name Label name 1000 Boiler soot blowing system 26 Flow Meter 1 Steam source 27 Pressure gauge 21 Main drainage road 31 Sootblowing pipeline 22 Drain switch 32 Sootblower 23 Drain bypass 33 Temperature Sensor 24 Steam Control Valve 34 Temperature display 25 Expansion bend
[0023] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0026] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0027] Please refer to Figure 1In order to solve the problem of increased risk of boiler tube leakage, the utility model proposes a boiler soot blowing system 1000, including:
[0028] Steam source 1, drain assembly and at least one sootblowing assembly; the drain assembly includes a drain main line 21 and a drain switch 22, the head end of the drain main line 21 is connected to the steam source 1, and the drain switch 22 is arranged at the tail end of the drain main line 21; each sootblowing assembly includes a sootblowing pipeline 31 and at least one sootblower 32; the head and tail ends of each sootblowing pipeline 31 are respectively connected to the drain main line 21; each sootblower 32 in each sootblowing assembly is respectively arranged on the corresponding sootblowing pipeline 31. Before sootblowing, the drain switch 22 and each sootblower 32 are closed, and the steam returns to the drain main line 21 from the drain main line 21 through each sootblowing pipeline 31 to realize the circulation of steam to warm the pipes, and after the pipe heating is completed, each sootblower 32 is opened to blow soot on the boiler.
[0029] In the technical solution of the utility model, steam circulates in the boiler sootblowing system 1000, eliminating the blind spots for heating pipes in each sootblowing pipeline 31, preventing some sootblowing pipelines 31 from being effectively heated and condensing part of the steam into water vapor, thereby reducing the probability of steam containing water vapor entering the boiler for sootblowing, thereby reducing the risk of leakage of furnace tubes due to damage to the heating surface of the boiler.
[0030] Specifically, the boiler sootblowing system 1000 includes one or more sootblowing assemblies. In one embodiment, the boiler sootblowing system 1000 includes three sootblowing assemblies.
[0031] Further, each sootblowing assembly includes one or more sootblowers 32. In one embodiment, each sootblowing assembly includes three sootblowers 32.
[0032] It can be understood that the tail end of each sootblowing pipeline 31 can be respectively arranged on the main drain line 21, or can be respectively connected to a branch line and then connected to the main drain line 21 through the branch line. In one embodiment, the drain assembly also includes a drain bypass 23, the tail end of the drain bypass 23 is connected to the main drain line 21, and the tail end of each sootblowing pipeline 31 is respectively connected to the head end of the drain bypass 23; the head end of each sootblowing pipeline 31 is respectively connected to the pipeline between the head end of the main drain line 21 and the tail end of the drain bypass 23 on the main drain line 21. Such an arrangement can make each sootblowing pipeline 31 in the same steam circulation pipeline, and to a certain extent can ensure that the air pressure in each sootblowing pipeline 31 is consistent, that is, the steam pressure sprayed by each sootblower 32 is consistent, so as to achieve a consistent soot cleaning effect at various parts of the boiler.
[0033] In one embodiment, the extension direction of the drain bypass 23 is inclined downward along the gravity direction and the head end of the drain bypass 23 is higher than the tail end of the drain bypass 23. This arrangement forms a drain slope, and when soot blowing is completed, the steam remaining in the drain bypass 23 will condense into water, and the condensed water can slide down the drain bypass 23 and fall into the drain main path 21 under the action of gravity, and then the drain switch 22 can be opened to discharge the condensed water from the boiler soot blowing system 1000; thereby ensuring the dryness of the drain bypass 23 to avoid the water remaining in the drain bypass 23 from damaging the boiler during the next soot blowing.
[0034] In one embodiment, the sootblowing assembly further includes a temperature sensor 33, and the drain switch 22 is a solenoid valve; the temperature sensor 33 is arranged in the pipeline of the drain main line 21, and the temperature sensor 33 is electrically connected to the solenoid valve through the industrial computer. Before sootblowing, the steam warms the pipeline in the boiler sootblowing system 1000. At this time, the pipeline temperature in the boiler sootblowing system 1000 does not reach 260°C, and the temperature sensor 33 transmits the temperature signal to the industrial computer, and the industrial computer controls the solenoid valve to remain in a closed state; when the pipeline temperature in the boiler sootblowing system 1000 reaches 260°C, it is considered that the pipe warming is completed. At this time, the industrial computer controls the solenoid valve to partially open, so that the solenoid valve remains in a slightly leaking state, so that the condensed water generated during the sootblowing process can flow out of the boiler sootblowing system 1000 from the valve port of the solenoid valve.
[0035] In one embodiment, the sootblowing assembly further includes a temperature display screen 34, which is disposed at the tail end of the main drainage path 21 and is electrically connected to the temperature sensor 33. The temperature display screen can display the temperature in the boiler sootblowing system 1000 in real time; after sootblowing is completed, when the temperature in the boiler sootblowing system 1000 drops to room temperature or slightly above room temperature, the solenoid valve can be manually opened to discharge the water formed by the condensation of the steam in the boiler sootblowing system 1000 from the valve port of the solenoid valve out of the boiler sootblowing system 1000.
[0036] In one embodiment, the drain assembly further includes a steam regulating valve 24, which is disposed at the head end of the drain main path 21. The steam regulating valve 24 is used to adjust the flow rate of the steam supply.
[0037] In one embodiment, the drain assembly further includes a flow meter 26, which is disposed in the drain main path 21 and located at an end of the steam regulating valve 24 away from the steam source 1. The flow meter 26 is used to monitor the flow of steam in the drain main path 21 in real time, and then the flow of steam in the drain main path 21 can be adjusted to a more ideal value through the steam regulating valve 24.
[0038] In one embodiment, the drain assembly further includes a pressure gauge 27, which is disposed in the drain main path 21 and located at an end of the steam regulating valve 24 away from the steam source 1. The pressure gauge 27 is used to monitor the steam pressure in the drain main path 21 in real time, thereby preventing the steam pressure from being too high during soot blowing and damaging the boiler.
[0039] In one embodiment, an expansion bend 25 is formed at the connection between each sootblowing pipeline 31 and the drain bypass 23. During sootblowing, the temperature in the boiler sootblowing system 1000 is relatively high, and the material of the pipeline is generally metal; according to the characteristics of metal thermal expansion and contraction, an expansion bend 25 is provided at the connection between each sootblowing pipeline 31 and the drain bypass 23 to prevent cracks from occurring due to thermal expansion of the metal at the connection, thereby reducing the probability of steam leakage in the boiler sootblowing system 1000.
[0040] The utility model also proposes a boiler, which includes a boiler sootblowing system 1000. The specific structure of the boiler sootblowing system 1000 refers to the above-mentioned embodiment. Since the boiler adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.
[0041] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A boiler sootblowing system (1000), characterized in that: include: Steam source (1); A drain assembly, the drain assembly comprising a drain main path (21) and a drain switch (22), the head end of the drain main path (21) being connected to the steam source (1), and the drain switch (22) being arranged at the tail end of the drain main path (21); as well as At least one sootblowing assembly, each of the sootblowing assemblies comprising a sootblowing pipeline (31) and at least one sootblower (32); both ends of each sootblowing pipeline (31) are respectively connected to the main drain path (21); and each sootblower (32) in each sootblowing assembly is respectively arranged on the corresponding sootblowing pipeline (31).
2. The boiler sootblowing system (1000) according to claim 1, characterized in that: The drain assembly further comprises a drain bypass (23), the tail end of the drain bypass (23) being connected to the drain main path (21), and the tail ends of each of the soot blowing pipelines (31) being respectively connected to the drain bypass (23); the head end of each of the soot blowing pipelines (31) being respectively connected to the pipeline between the head end of the drain main path (21) and the tail end of the drain bypass (23) on the drain main path (21).
3. The boiler sootblowing system (1000) according to claim 2, characterized in that: The extension direction of the hydrophobic bypass (23) is inclined downward along the direction of gravity, and the head end of the hydrophobic bypass (23) is higher than the tail end of the hydrophobic bypass (23).
4. The boiler sootblowing system (1000) according to claim 1, characterized in that: The sootblowing assembly further comprises a temperature sensor (33); the drain switch (22) is a solenoid valve; the temperature sensor (33) is arranged in a pipeline of the drain main path (21); the temperature sensor (33) is electrically connected to the solenoid valve.
5. The boiler sootblowing system (1000) according to claim 4, characterized in that: The sootblowing assembly further comprises a temperature display screen (34), wherein the temperature display screen (34) is arranged at the tail end of the main drainage path (21), and the temperature display screen (34) is electrically connected to the temperature sensor (33).
6. The boiler sootblowing system (1000) according to any one of claims 1 to 5, characterized in that: The drain assembly further comprises a steam regulating valve (24), and the steam regulating valve (24) is arranged at the head end of the drain main path (21).
7. The boiler sootblowing system (1000) according to claim 6, characterized in that: The drain assembly further comprises a flow meter (26), wherein the flow meter (26) is arranged on the drain main path (21) and is located at an end of the steam regulating valve (24) away from the steam source (1).
8. The boiler sootblowing system (1000) according to claim 6, characterized in that: The drain assembly further comprises a pressure gauge (27), wherein the pressure gauge (27) is arranged on the drain main path (21) and is located at an end of the steam regulating valve (24) away from the steam source (1).
9. The boiler sootblowing system (1000) according to claim 2 or 3, characterized in that: An expansion bend (25) is formed at the connection between each sootblowing pipeline (31) and the drain bypass (23).
10. A boiler, characterized in that: The boiler comprises the boiler sootblowing system (1000) according to any one of claims 1 to 9.